Proteins can be classified into two types on the basis of their molecular shape i.e., fibrous proteins and globular proteins. Examples of globular proteins are :
In globular proteins, polypeptide chains are coiled with each other to give spherical shape and they are soluble in water. Insulin and Albumin have a spherical shape. So options (i) and (iii) are correct.
But Myosin has long and narrow shape and they are water-insoluble, which is the characteristic of a fibrous protein. Therefore, option (iv) is wrong.